Because of their service. That's why it's always highly suggested to tip, but if you have bad service you're not going to want to give much. It's just a way of showing your gratitude.
NO!
Technically, they are not supposed to take a tip. Unless you really insist!
In the United States, it is not customary or expected to tip gas attendants when refueling your vehicle.
Not quickly, no. but in time it does.
give a tip and say thank you
Yes, it is customary to tip shuttle drivers, typically around 1-2 per bag they help with or per person they transport.
Yes, it is customary to tip for full service gas in some regions, but it is not required. Tipping is a way to show appreciation for the service provided.
Yes, it is customary to tip airport shuttle drivers, typically around 2 to 5 per person depending on the level of service provided.
Tipping gas pumpers is not a common practice in the United States. It is not expected or required to tip gas pump attendants when refueling your vehicle.
Proper etiquette would be to tip the person taking your luggage to your room. How much to tip that I do not know. I would say at least $5-$15 depending on how many bags they are taking to your room for you.
Provincetown, a town on the tip of Cape Cod
For hire drivers of limos, sedans, taxis, charter buses, and so on expect to be tipped in California and Canada